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<h1>Comments 注释</h1>
<?php
echo "// This is a single-line comment";
echo "# This is also a single-line comment";
// This is a single-line comment
# This is also a single-line comment
/*
This is a multiple-lines comment block
that spans over multiple
lines
*/

// You can also use comments to leave out parts of a code line
$x = 5 /* + 15 */ + 5;
echo $x;
?>
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